1. To strengthen water and air contact area, improve the dissolved oxygen and water circulation. 2. For the planted aquarium can be flat against the of the water, by removing the water film to facilitate plants for photosynthesis. 3. For the semi-Waterscape ecological cylinder may cause convergence control soft water falls, creating a more natural and healthy ecological landscaping. Versatile and effective, this oil film remover is perfect for both home aquariums and public displays in places like hotel lobbies or offices. It keeps aquariums clean and visually appealing, enhancing the overall aesthetics and hygiene of the environment. Product Specifications: Material: acrylic Color: transparent Size:20mm Note:DIY assembly. Bulk shipment. After arrival, it needs to be assembled by oneself. Note:If cutting is required, it can be paired with scissors purchased from our store for cutting acrylic tubes. Rotating operation during cutting. Package Contents: 1*Aquarium Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.